W4 6315 then FR 9811 at Barcelona
Milan → Barcelona → London Stansted
Timetable, Barcelona time
12:25W4 6315 from Milan at the gate
07:55FR 9811 to London Stansted leaves the gate
19 h 30 apart on the timetable, overnight
FR 9811 leaves 19 h 30 after W4 6315 arrives on the timetable: more than half a day, so not a connection we count.